drm: bridge/dw_hdmi: protect n/cts setting with a mutex

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The HDMI n/cts settings need to be updated whenever the audio sample
rate or the video pixel clock changes.  This needs to be protected
against concurrency as there is no synchronisation between these two
operations.  Introduce a mutex (called audio_mutex) to protect against
two threads trying to update the video clock rate and pixel clock
simultaneously.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Russell King 2015-02-02 11:01:08 +00:00

parent 351e1354fc

commit 6bcf495317

1 changed files with 8 additions and 0 deletions

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drivers/gpu/drm/bridge/dw_hdmi.c

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